Wire stitching machine



Feb. 7, 1933. J, NASMITH WIRE STITCHING MACHINE Filed Jan. 15, 1951 a 15 14 ya Patented Feb. 7, 1933 Um-EDI STATE PATENT JOHN IRVING NASMITH, or ELTHAM, ENGLAND, AssIe'noRT'ro 'vIcxnns-msrnonos" LIMITED, or WESTMINSTER, ENGLANDLVA- BRITISH CQMPANY 1;

i WIRE s'rrrcnme MACHINE Application filed. January 18, 1931,"sria1 Noi $08,456, and in great 'Brit ain nee'ember i,"1936;

This inventionrelates to wire stitchingm'a chines. Such machines areusually provided with suitably operated members for the pur-- pose of feeding a length of wire, for bending it into a staple and for driving the staple thus formed into the work to be stitched; The members are afforded their correct timed motions'by means of cams or otherii'neans driven from the driving shaft ofthemachine. By

suitable adjustment of the various motions of the members the correct actuation thereof according to a predetermined timed cycle is obtained. The present invention has exclu sive reference to wire stitching machines "in which the motion for feeding the wire for the stitches or staples is initially derived from a revolving feed cam. The feed" cam is adapted to actuate a two armed teed lever which imparts propermotion to mechanism which performs'thefunction of feedin a length of wire for the stitch or staple. Ailer the len gth of wire has been fed, a member known as the former bends the length of wire in conjunction with another member (gen e'rally referred to as the loop bar) into the form of a staple and supports the formed staple whilst being driveninto the work by th'eaction of a member known as the driver.

The object of the present invention is; to. improve the mechanical detailsof this type of machine and to overcome certain defectscommon to machines of this type at presentin The invention consists in a wire stitching machinecomprismg a two armed feed'l ever.

for feeding a length of wire, a rev olvin g feed cam for operating said feed lever, a former for forming the length of wire into a staple,

a a cam for operating said former and a driver to for driving the staple thus formed into the work, both arms of said feed lever and the said cam lying and moving in the same plane as that of the driver and former. The driver is actuated by means of a link connected to the feed cam and is preferably arranged so that the crank pin or the pinupon which the link is pivoted is totally enclosedand contained in the feed'cam. The driver is thus afl'orded a vertical reciprocating motion of suitable amplitude forthe purpose of driving the staple into the work. The-feed lever is oscillated by means ofthe feed cam which asabov-ementioned 'actuates the driver by means of the aforesaid linkfland the former is given its timed motion by means of a cam thepath ofwhich preferably lies entirely external to theifeedcam-r' ,By such adi'sposi tion of the parts the twisting forces set'up' ini actuating the members is reduced to a m1n1mum.- y I In order that the "said invention may be: clearlyunderstood and readily carriedinto efl'ect thesame will: now be niorefully .'described ,ith reference to the' accompa'nying' in which? I a "Figure 1 is a front elevation of one end of a wire stitching machine with the front cover of the machine removed so as to expose the V mechanism accordin'gtothe invention; f:

Figure 2 is a vertical sectional elevation taken'along the line 2+2 of Figure 1, and V Figure 3 is a horizontalsection' takenalong 1 the line 3-3 of Figure '1.

The driving shaft 4 of the machineiscarri vided with acampath 8with which co operates a roller'9 which is attached to andactu ates thejformer 10. The sha'ft 4 also carries the feed cam 11 whichmaybe separate from the cam plate 7 or as shownit may be formed,

integrally therewith; The driver 12 is adapt-j ed 'toreciprocate in guides provided on the former 10 and for the purpose of actuating the driver 12 a link 13 isprovidedconnected to'the upper end of the driver 12 and to the feed cam 11. The link13is' provided with f.

a'crank pin 1i] which: is totally enclosed and containedin the feed cam 11., The front face ofthe' feed'c'am llis arranged immediately adj acentto the inner face of the link B and v rontl face Y lies in -the' plane containingfthe of theldriverfll The feedlever 14 p; otedf at 15 upon the frame of the machine operates at one end againstlthe periphery onworking 1 face of the feed cam 1 11 The 'working fa'ce of a the" feed; cam is as shown arranged ver-f f tic ally above the driver and former. order ever, the feed cam may be formed as a double sided cam so as to operate the feed lever posi tively ibothkdirections. The former cam i groove 8 is provided in the camplate 7 .im'-- mediately behind the feed cam 11 and thus necessarily is such that the cam path 8 is entirely exterior to the periphery of the feed .Due totheabove described arrangement it,

will be observed from -F igure 3 that the three operated members, namely the feed lever, the

former and driver may be arranged in a single plane or in other words thetwoxarms of thefeed lever 14 may be so arranged that bothbf them li'e in thesame plane as-rthat of y the :driver and former. V I n I k 7 What I claim anddesire to secure by Letters Pa tent of the United States is v 1. A wire stitching machinecomprising a two "armed feed lever for. teedingga length of wire, a revolving cam for operating said feed lever, a former for forming the length of wire'into a staple, a cam for operating said former, and a driver fordriving the 'staple thus formed into'the work, both arms o fsaid feed lever and the. said cam lying and moving in the same plane as that of the driver and former." V I V.

'2. A'wire stitching machine com. rising a two armed feed lever forfeeding a ength of Vwir'e, a former for forming the length of wire formed'into the work, both arms of said feed ler'er being arranged so that they lie and move in the same plane as that 'of the driver and former, and-a revolving cam for operat= ing the feed lever disposed vertically above means for feeding alen'gth of wire, a :form'er; for forming the length of wire intoa staple,

j for driving the staple thus formed intothe into a staple, a camfor operating said former,

and a driver-for driving the staple thus former I ,7 3. A wire stltchmg machine comprising and in vthe same plane as the; driver and a cam for operating said former, and a driver Work, a two armed feed lever', a cam for actuthe feed lever, said feed lever and said a'tin V camieing disposedin the same plane as that ofithe driver and former,-and a link-connected a former for forming the length of wire into a staple and 'a driver for driving the staple thus formed into the work, said feed lever and the said cam being disposed in the same plane as the driver and former, a cam 7 for actuatlngthe formensaldc-am for .actuatin'gythe" lever being situated infront of said cam which actuates theformer.

'6. A wire stitching machine comprising a two, armed reed lever for feeding a length;

of wire, a camJfor operatingsaid feed lever, a formerfor forming the length of wire into ,a staple and a driver for driving the staple thus formed into the worln'both arms ofsaid lever lying and moving in the same'plane as that of the driver and former, a camf f or. actuating the former, said cam for actuating the feed lever beingsituated in front of the cam 'which actuates the former. v c p in'claim5, wherein the cam which actuates the former is situated entirely external to the feedc'amJ 7 A wire stitching machine as 81 A wire stitching machine as in claim wherein the cam which actuates the'iormer is situated entirely external to the feed cam.

A wire stitchingmachine comprising a.

two armed lever for feeding a length of wire, a .former for forming the length of wire into a staple and a driver for driving the staple thus formed into the work, botharms oi said feed lever lying" and" movin for actuating the feed lever, a link connected V p p I in the same plane as thatof the driver an former, a cam to said cainfand' to the driver for actuating the latter,'said ,link' being connected to said cam by means of a crank pin which is com-V pletely enclosed or contained in the cam.& f

10; A wire stitchingmachine comprising 7 a two armed lever for feeding a length of wire, a former for forming the len h of wire into astaple and a driver for living the staple thus formed into the work ,.both V arms of said reed lever lying and moving in "the same plane'as that of the driver and former, acam for actuating thefeed-lever disa link connected to said camfand to 'thedriver for actuating the latter, said link being connected'to said camby means of a crank pin" which -is com pletely enclosed or contained in the cam. A I

JOHN IRVING NAS MiTH. f

to said cam and to the driverfor ac'tuating" or the-latter,

4. Awire stitching'nrachine' as, clai wherein the link is connected to s'aid cam byFmeans of a crank pinwhich is completely enclosed or contained in thecam. J

twoarmed feed lever for feeding a length or wire, "a' cam for operating said ff eed lever,

achine comprlsing a 11, posed vertically above the driver and former; f '1 

